Microsoft's Turtle looks like a chunky child's version of a Palm Pre, according to Gizmodo.
Gizmodo

"Project Pink" is Microsoft's new phone for regular people. Rumors about the software go back months, but the hardware, and who's making it for Microsoft, has been a mystery. Here are the first pictures of Pink phones, Turtle and Pure.

These phones are going to be made by Sharp, which will get to share branding with Microsoft. Sharp produced the Sidekick hardware for Danger, which was bought by Microsoft two years ago. (Which is honestly the only reason we can think of why Microsoft stuck with Sharp for the new phones, versus someone like HTC.) Pink will be primarily aimed at the same market as the Sidekick, and branding and identity for it is highly developed, pointing toward a later stage in the development cycle.

Microsoft's Pure looks like a standard slider.
Gizmodo

The hardware design has a younger feeling too: Turtle looks like a chunky child's version of a Palm Pre, while Pure seems like a standard slider, and both are clearly plastic. They have an overall sense of roundedness, with lots of soft angles and circular keys.

It's been reported elsewhere that Pink phones will include Zune services, and have its own app store, making it as close to the Zune phone as we may get. We'll see if it's close enough in the coming months, though these are the only facts our source will let us safely publish for now.